1,9-Thianthrenedicarboxylic acid from Japan
1,9-Thianthrenedicarboxylic acid is a polycyclic aromatic heterocyclic compound with sulfur bridges and carboxylic acid groups. Explicitly named in HTS 2934.99.05.00 under 'other heterocyclic compounds: aromatic.' Used in specialty dyes and advanced material synthesis.
Duty Rate — Japan → United States
5.8%
Rate breakdown
9903.03.030%Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Import Tips
• Provide molecular weight and carboxylic acid titration data to confirm identity and acid-function classification
• Ensure proper corrosion-resistant packaging due to carboxylic acid properties during ocean freight
• Declare exact CAS registry number to prevent confusion with thianthrene derivatives in other subheadings